Mmm, when I was young and foolish, I thought semi autos were the be-all and end-all of handgunning. Then I grew up (shortly after I shot my first revolver).
I still think the semiauto is best for those who go looking for trouble -- soldiers and policemen. They might be where their butt is in the breeze, and they don't GET to retreat.
For me, as a civilian, give me a wheelgun any day.
As said before, they have more class. Must be the steel and wood/bone/ivory thing. Sure, 1911s, P35s, Lugers, are all nice, but heck when you get down to it, their grips are small and flat. There's just so much more you can do to get fancy grips for a revo. Couple that with the deep, deep blue of the older revos, the color case hardened ones, mmm, mmm, good.
Plus, I happen to shoot revos better, and I like magnums.
I think there'll always be a market for revolvers, at least until we aren't using chemical propellant-based firearms.
I do own a lot more revolvers than semiautos.